One Direction star Niall Horan has admitted that his band's concert in Milan last night (May 20) was "mental".

The British group performed at the Mediolanum Arena to a packed crowd as they continue their Take Me Home European tour.

Speaking on Twitter post-gig, Niall Horan said that their fans had been particularly enthusiastic all day - meaning that come stage-time, the crowd was hyped. He said:

"Milano was epic! U guys were crazy!"

The Irishman later added: "Absolutely mental in Milan last night! Knew it was gona be! I could tell by the rampage of our fans in the streets in the daytime."

Next up on One Direction's touring schedule is a show in Barcelona on Wednesday night (May 22).